The Chelsea captain, John Terry, has signed a one-year contract extension. Photograph: BPI/Rex

John Terry has extended his stay at Chelsea into an 18th professional season after signing a new 12-month deal at Stamford Bridge, with José Mourinho saying that sentiment had played no part in the award of the extension.

The former England international, who hoisted his 13th major honour as a Chelsea player when the team claimed the Capital One Cup earlier this month, has made 661 appearances for the club since his debut in 1998. Terry’s career had appeared to be winding down over Rafael Benítez’s interim stewardship at the club in 2012-13, when niggling injuries had hampered his impact, but has been revived under Mourinho. He is an ever-present in the Premier League to date this term.

“This new contract is not to say: ‘Thank you very much’,” said the Chelsea manager. “It is because John continues to perform. He is a top defender. I am happy that he completely deserves this new contract after a season where he has already played 40 matches.”

The league leaders have long since implemented a policy of offering players over 30 only 12-month extensions, with this now the second Terry has signed.

“I’m delighted to have signed an extension to my contract with Chelsea,” said the centre-half. “After adding another major trophy to my collection this month I hope myself, the players and manager can continue to bring success to our club. Playing for this great club makes me so proud. And as always I would like to thank the fans who have continually supported me.”

The emergence this season of Kurt Zouma as a centre-half of real potential has added to Chelsea’s options and, while another defender may be added to the ranks at the end of the season, Terry’s form had demanded that his stay at the club be prolonged. The 34-year-old is hoping to claim his fourth Premier League title this term, adding that to three League Cups, five FA Cups, a European Cup and the Europa League.